GStreamer JPEG 2000 Workflows

[Miloš Selečéni]

Hi Aaron, thanks for your work on improve J2K support inside GStreamer. I
like to see that Jpeg2000 become more and more popular.
We use Gstreamer mainly for transcoding e.g H246 -> some J2K container like
MPEG-TS or MXF and also for streaming MPEG-TS over RTP protocol

There are some features we like to have in MPEG-TS like support for
J2K(which I'm working on) or support for NULL packets in MPEG-TS which is
good for constant bitrate when you are streaming ...



On Mon, Jun 27, 2016 at 9:43 AM, Sebastian Dröge <sebastian at centricular.com>
wrote:

> On So, 2016-06-26 at 09:46 -0400, Aaron Boxer wrote:
> > Ni Nicola,
> >
> > Thanks for running these experiments - I didn't know about the timing
> feature in gstreamer.
> > It is interesting that openjpeg 2.1 is about 3 times slower than
> openjpeg 1.5. Since the core
> > encoding is not that different between the versions, the only
> explanation I can think of
> > is that the test source is monochrome, and openjpeg 2.1 encoder is
> treating it as RGB or YUV.
> > I will definitely take a look.
>
> OpenJPEG 2.1 has a different API that is less efficient to use for
> GStreamer. More copying is going on, but I can't remember details.
>
> IIRC I told you about that a few weeks ago on this list already :)
>
> --
>
> Sebastian Dröge, Centricular Ltd · http://www.centricular.com
>
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>
>


-- 

*Miloš Selečéni*

*GPU Developer | Comprimato Systems s.r.o.*
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